The full number will be released at 1 p.m. ET. (Late Update: The number has been posted, with 49% approval to 44% disapproval.)

As Gallup has previously noted, every president since World War II, except for John F. Kennedy, eventually went below 50%. The shortest time for such a fall belongs to Gerald Ford at three months, while the longest (except for Kennedy, and his tragically shortened administration) was Dwight Eisenhower at 63 months, the only president to last through a full first term above 50%.

Falling below 50% doesn’t necessarily spell defeat for re-election. Obama’s ten months will match the ten months for Ronald Reagan, who was of course re-elected in a landslide, and Bill Clinton only stayed above 50% for four months.